No-reference video quality evaluation method aiming at video conference

A technology of video quality and evaluation method, which is applied in the direction of video conference system, TV, two-way work system, etc., can solve the problems of not considering the particularity of video conference scene, not considering the function of HVS, ignoring the influence of video content characteristics and video quality, etc. Achieve good flexibility and adaptability, good universality and high accuracy

Inactive Publication Date: 2013-09-11
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

[0004] Although the existing video quality assessment methods have achieved certain results, some relatively mature models have been formed; for example, in the literature titled Image quality assessment: From error visibility to structural similarity (IEEE Transactios on Image Processing) by Wang Zhou et al. Two video quality evaluation models based on PSNR (Peak Signal-

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  • No-reference video quality evaluation method aiming at video conference
  • No-reference video quality evaluation method aiming at video conference
  • No-reference video quality evaluation method aiming at video conference

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[0068] The goal of bit rate control is to allocate a limited bit stream to a suitable area to get the best video quality. The research results show that the uniformity of code stream distribution within a frame of video has a certain relationship with the video quality, and the centralized distribution of limited code streams to the most suitable position is beneficial to improve the video quality. Therefore, this embodiment uses the variance D of the code stream value per frame of image consumption B To reflect the degree of concentration of code stream distribution, in order to evaluate the impact of code stream distribution on the objective quality of the video. However, any rate control algorithm cannot completely ensure that the code stream can be allocated to the appropriate area, and the accuracy of the code stream distribution is C RC It also has a certain impact on video quality. In this embodiment, according to the influence of the ROI on the video quality caused by ...

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Abstract

The invention discloses a no-reference video quality evaluation method aiming at a video conference. The no-reference video quality evaluation method aiming at the video conference comprises confirming ROI of an image; computing quantization influencing parameters of the image; computing code rate control influencing parameters of the image; and computing a video quality evaluating value. The no-reference video quality evaluation method aiming at the video conference which is formulated according to video conference characteristics such as simple conference scenes and special areas human eye interested in has the advantages of enabling a video quality evaluation result to be obtained just with videos to be evaluated, being good in the flexibility and the adaptability and high in the evaluation result accuracy, satisfying subjective perception of human eyes to the videos, being capable of obtaining accurate evaluation results of videos with different scenes and being good in universality.

Description

technical field [0001] The invention belongs to the technical field of video quality evaluation, and in particular relates to a no-reference video quality evaluation method for video conferences. Background technique [0002] With the rapid development of computer and network communication technology, people's demand for multimedia information is increasingly strong. In recent years, video-related applications cover various fields, such as video conferencing, video surveillance, and mobile TV. Among them, video conferencing is a multi-party communication that mainly transmits visual information. Human cost has very important practical application value. In video conferencing applications, video information needs to be compressed and transmitted before reaching the receiver, and these processes often result in loss of video quality. In order to obtain a better subjective effect, it is necessary to evaluate the video quality, and adjust the parameters of the encoder and tra...

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Application Information

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IPC IPC(8): H04N17/00H04N7/15
Inventor 林翔宇马汉杰冯杰张华熊胡洁
Owner ZHEJIANG SCI-TECH UNIV
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